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Availability:
20 in stock
Super-precision angular contact ball bearing, 70 x 125 x 24 mm, 15° contact angle, phenolic cage, built to an SKF special internal specification (C78) — for machine-tool spindles and other high-speed precision mountings.
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$168.44
20 in stock
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| MFR / Brand | SKF |
|---|---|
| MPN | 7214CTCC78G1 |
| Model | 7214 CTC C78 G1 / 2M214WI CR |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 70 mm |
| OD | 125 mm |
| Width | 24 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7200 Series |
| Condition | New |
| Lubricant | Oil/Grease |
| Preload | Light |
| Base Number | 7214 |
| Industry Terms | spindle bearing, super precision angular contact, phenolic cage bearing, machine tool bearing |
| Application Types | Machine tool spindles, grinding spindles, high-speed milling heads |
| Bore Shaft Size | 70 mm |
| Mpn Variants | 7214CTCC78G1, 7214-CTC-C78-G1, 7214 CTC C78 G1, 7214CTC/C78, 7214C, 7214 |
| Manufacturer Status | SKF super-precision range; MRC and SNFA precision lines absorbed into SKF |
| Arrangement Configuration | Single bearing; matched-set status not confirmed |
| Additional Attributes | C78 and G1 are SKF special-order suffixes; their meaning is not published by SKF and is deliberately not guessed at here. |
| Min Temp | -30°C |
| Cage Type | Phenolic Cage |
| Dynamic Load Rating | 76.1 kN / 17108 lbf |
| Static Load Rating | 65.5 kN / 14725 lbf |
| Precision Rating | ABEC 5 / P5 |
| Rolling Elements | Balls |
| Max Temp | 120°C |
| Item Weight | 2.45 lbs |
| Cage Material | Fabric-reinforced phenolic resin |
| Limiting Speed | 13000 rpm |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 15 degrees |
| Design Units | Metric |
| Bearing Material | Bearing steel |
| Running Accuracy | P4 |
| Part Number | 7214 CTC/C78 G1 |
| Running Accuracy Radial And Axial Runout | P4 |
| Cross Reference 1 | 2MM214WI CR (Fafnir / Timken carton marking) |
|---|---|
| Cross Reference 2 | NSK 7214CTYNSULP4 |
| Cross Reference 3 | NTN 7214CGD2GLP4 |
| Cross Reference 4 | MRC 7214 (legacy, absorbed into SKF) |
A single-row super-precision angular contact ball bearing in the 72 dimension series, 70 mm bore by 125 mm outside diameter by 24 mm wide, supplied to an SKF special-order internal specification. The carton also carries the Fafnir/Timken world number 2MM214WI CR for the same envelope.
7 — angular contact ball bearing
2 — 72 dimension series
14 — bore code, 70 mm
C — 15° contact angle in SKF nomenclature
T — fabric-reinforced phenolic resin cage, machined
C78 — SKF special internal specification (clearance/preload to a customer drawing). SKF does not publish what C78 resolves to, so it is carried here as an undecoded suffix rather than guessed at
G1 — a further special-order suffix with no published meaning; also carried undecoded
The previous copy asserted manufacture in the United States. No origin marking is documented for this item and SKF makes super-precision bearings in several countries, so no country of origin is claimed. Shipping promises and sales calls-to-action have also been removed from the product copy.
A 15° contact angle favours speed and radial stiffness over axial capacity — it is the standard choice for grinding and high-rpm milling spindles. The phenolic cage is the reason this bearing runs fast: it is light, self-lubricating and forgiving of momentary lubricant starvation, which is why machine-tool builders specify it over pressed steel. Phenolic does set a temperature ceiling, so it is not a high-temperature bearing.
Because C78 is a special internal specification, the standard catalogue load ratings and limiting speeds for a stock 7214 do not necessarily apply, and SKF publishes nothing for this variant. No rating figures are stated rather than borrowed. Boundary dimensions 70 x 125 x 24 mm are the ISO 72-series values and are confirmed.
These are single bearings. The stock quantity shown is a piece count, not a set count, and the special C78 specification means we cannot confirm from the designation alone whether these were originally supplied as matched pairs. If you need a matched set, ask us to check the ring etching and carton markings before you order.
Same-envelope 15° super-precision bearings include Fafnir/Timken 2MM214WI CR (the number on this carton), NSK 7214CTYNSULP4 and NTN 7214CGD2GLP4. Because C78 is a special spec, treat any of these as an envelope match rather than a drop-in performance match, and confirm preload requirements with the machine builder. MRC and SNFA precision ranges were both absorbed into SKF, so legacy MRC 7214 spindle numbers route here.
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